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Figure 2
Overlay diagram of the two organic mol­ecules in (I)[link]: neutral mol­ecule (blue image) and zwitterion (red). The mol­ecules have been overlapped so that the five-membered rings are coincident.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 75| Part 5| May 2019| Pages 565-570
https://doi.org/10.1107/S2056989019004389
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